I think my front offside suspension is on it's way out, there's a different noise coming from it when I try and compare sound's from the nearside.

Is it easy to replace and which part is it from GSF web site?

It's a 02 plate vRS

All thank's in advance

Odds on it's the ARB drop link if the noise is definitely one side only. If it's both side it's either the ARB mounting bushes or the radiator mounts. Try pushing the top of the radiator when cold to confirm or eliminate that.